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Energies 2018, 11(2), 431; https://doi.org/10.3390/en11020431

Harmonic Analysis of Single-Phase Neutral-Point-Clamped Cascaded Inverter in Advanced Traction Power Supply System Based on the Big Triangular Carrier Equivalence Method

1
School of Electrical Engineering, Southwest Jiaotong University, Chengdu 611756, China
2
National Rail Transit Electrification and Automation Engineering Technique Research Center, Chengdu 611756, China
*
Author to whom correspondence should be addressed.
Received: 17 January 2018 / Revised: 1 February 2018 / Accepted: 9 February 2018 / Published: 14 February 2018
(This article belongs to the Section Energy Storage and Application)
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Abstract

An advanced traction power supply system based on a single phase neutral-point-clamped (NPC) cascaded inverter is studied. The big triangular carrier equivalence method in double coordinate system is proposed, which can reduce one coordinate system, thus simplifying the calculation. Based on the big triangular carrier equivalence method, the harmonic characteristics of a single phase NPC cascaded inverter are calculated by double Fourier transform and voltage harmonics expressions of 5-level, 9-level and 13-level output waveforms are derived. Finally, the performance and calculated results of the proposed method were verified by simulations and experiments. The result provides a theoretical basis for further studies on traction network resonance. View Full-Text
Keywords: advanced traction power supply system; big triangular carrier equivalence method; double Fourier transform; harmonic analysis advanced traction power supply system; big triangular carrier equivalence method; double Fourier transform; harmonic analysis
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Han, P.; He, X.; Wang, Y.; Ren, H.; Peng, X.; Shu, Z. Harmonic Analysis of Single-Phase Neutral-Point-Clamped Cascaded Inverter in Advanced Traction Power Supply System Based on the Big Triangular Carrier Equivalence Method. Energies 2018, 11, 431.

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